The circus is in town and the Ghostbusters are chasing a shape-shifting spook. Little do they know that elsewhere, Denita escapes a small town ruled by Master Cosmos and goes in search of help. She finds the Ghostbusters and explains to them her problem. The Ghostbusters must travel back with her to her village and release the souls of the tortured inhabitants from the power of Cosmos. But first, they need to get past his killer circus!